Potencial evocado auditivo de tronco encefálico em equinos

Pós-graduação em Medicina Veterinária - FMVZ

Alunos com surdez e o processo de inclusão: uma análise dos discursos sobre língua de sinais

The process of inclusion of deaf students at regular and specialized educational institution is a complex issue, which has the main point of discussion its specificity linguistic represented by Brazilian Sign Language. Whereupon, this research analyzed how the discourses of young students with deafness on this type of education at regular and specialized educational institution from a city situated in the State of São Paulo. The aim of this study was analyze the relations between the discourses of deaf students and their production conditionals, using the dimension of Discourse Analysis and the historical-cultural psychology. As parts of this research, were used four deaf students enrolled in schools belong in the city of São Paulo, which two schools are regular and two are specialized to deaf people. The collection instruments build themselves in observation of dialogue situations in classroom and interview semistructured. The interviews were made by video recording, researcher and an interpreter. The results showed that discourse of the student enrolled in the specialized school differs in relation to the ideals of bilingual education, in this case defended by users of the Brazilian Sign Language, fact not observed in the context of the regular school.

Surdez: um estudo da formação continuada oferecida aos professores em uma diretoria de ensino no interior do estado de São Paulo

Pós-graduação em Educação Escolar - FCLAR

O processo de escolarização de crianças surdas no ensino fundamental: um olhar para o ensino de ciências articulado aos fundamentos da astronomia

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Material didático para alunos surdos: a literatura infantil em Libras

The storytelling is central to the early literacy of children, part of the objectives for the entire kindergarten. The story circle or storytelling is important and helpful in cognitive and emotional development of children, including the ones with disabilities. Seeking communicational accessibility, the aim of this work is to make the book "O Penuginha" by Luiz Vitor Martinello available in LIBRAS (Brazilian Sign Language). To facilitate the achievement of this objective, it was considered appropriate to develop a descriptive study following the methodology of qualitative research, to search for literature on how learning takes place in the Portuguese language by deaf students. This study resulted in a DVD with video recordings, the translation of the book "O Penuginha" in LIBRAS and the narration of the book in Portuguese. Therefore, this research is relevant because the paradigm of the twenty first century is the inclusion of all people in different scenarios and the school is one of the first places where the removal of barriers is essential.

Leitura em uma criança surda após equivalência de estímulos

This study aimed to evaluate the effects of a systematic teaching of relation between printed words and Brazilian Sign Language on the emergence of reading in one child with deafness, user of Brazilian Sign Language, diagnosed with deafness bi-lateral deep user of hearing, with 9 years and 4 months of age, enrolled in 4th year elementary school. Baseline evaluation selected nine words and their signs and figures to compose the teaching steps and tests that consisted of: (a) relationship between a sign and figure teaching, (b) the relationship between sign and printed word, (c) test of relationship between figure and the printed word and its symmetric (d) test signal in front of picture and the printed word. The participant learned the relationship between sign, figure and printed word and demonstrated reading. This procedure was effective for the participant to emit signals, verbally agreed with the community of Libras in front of textual stimuli, which is characterized as reading.

Avaliação do ler e do escrever de surdos pela língua brasileira de sinais

The use of Brazilian Sign Language (BSL) in the education of deaf people is guaranteed by Brazilian laws, but its adoption in educational policies requires an adjustment in terms of stimulus and response modalities. This study aimed at characterizing reading and writing performances of four deaf students who are BSL users and are in early literacy phases. The assessment was performed through selection tasks – signaling and writing – using an evaluation and teaching procedure that is usually adopted with hearing children. The results replicated data that has been documented in hearing children: performance was satisfactory in copying and identity matching tasks among pictures and graphic stimulus; performance was lower in reading and dictation tasks. Data show that investment targets regarding reading and writing teaching conditions programming require adjustments that are more related to the communication modality than to the teaching procedures.

O brincar para conhecer o desenvolvimento de crianças com implante coclear

This research analyses the development of children presented with profound deafness and benefited by the cochlear implant, discovery of great significance in hearing health. The work is based, theoretically, on Winnicott, and methodologically, in anamnesis data and playing on a set of ludic scenes, systematically organized. Ten pre-school children with implants, selected by hospital and homogenization eligibility criteria participate in this study encompassing interviews with parents and playful observation sessions with the children, besides Lynn´s Dolls Structured Game. In the children, the results show immaturity, regression to earlier stages of their development, dependency and behavioral disorders, in particular, those related to language, interrelationship and anxiety. In the parents, family disorientation, partly overcome. The children and family participating are assisted by a multidisciplinary health team, at the hospital where they are attended.

Ecóico e nomeação de figuras em crianças com deficiência auditiva pré-lingual com implante coclear

The aim of this work was to verify the effect of teaching the echoic behavior over the pictures naming in four children between eight and nine years old with prelingual hearing impaired, users of cochlear implants. The design adopted was: (a) pre-training that taught the matching-to-sample task; (b) pre-tests that selected three words to teach; (c) teaching of auditory-visual conditional relations; (d) naming pos-test; (e) the teaching of echoic with orofacial clues and, (f) the second naming pos-test. In the pre-test all participants achieved smaller percentage of correct on naming (60%-80%) and echoic (20%-50%) when compared to percentages word recognition (86%-93%). All participants learned the auditory-visual relations. The improvement on naming test occurred after auditory training select based for two participants; for other two participants the improvement on naming test occurred just after the training of echoic. Analysis of data showed that the listening and speaking performances are independent in their establishment and require specific conditions of teaching; in the case of this study, even though the result is not generalized to all participants, the highest correspondence into point to point naming was obtained following the teaching of echoic.

Importância da resposta auditiva de estado estável no diagnóstico da surdez em lactentes com risco para a deficiência auditiva: correlações com os achados do potencial evocado auditivo de tronco encefálico

Pós-graduação em Bases Gerais da Cirurgia - FMB

Importância da resposta auditiva de estado estável no diagnóstico da surdez em lactentes com risco para a deficiência auditiva: correlações com os achados do potencial evocado auditivo de tronco encefálico

Pós-graduação em Bases Gerais da Cirurgia - FMB

Diverse levels of an inwardly rectifying potassium conductance generate heterogeneous neuronal behavior in a population of dorsal cochlear nucleus pyramidal neurons

Leao RM, Li S, Doiron B, Tzounopoulos T. Diverse levels of an inwardly rectifying potassium conductance generate heterogeneous neuronal behavior in a population of dorsal cochlear nucleus pyramidal neurons. J Neurophysiol 107: 3008-3019, 2012. First published February 29, 2012; doi:10.1152/jn.00660.2011.-Homeostatic mechanisms maintain homogeneous neuronal behavior among neurons that exhibit substantial variability in the expression levels of their ionic conductances. In contrast, the mechanisms, which generate heterogeneous neuronal behavior across a neuronal population, remain poorly understood. We addressed this problem in the dorsal cochlear nucleus, where principal neurons exist in two qualitatively distinct states: spontaneously active or not spontaneously active. Our studies reveal that distinct activity states are generated by the differential levels of a Ba2+-sensitive, inwardly rectifying potassium conductance (K-ir). Variability in K-ir maximal conductance causes variations in the resting membrane potential (RMP). Low K-ir conductance depolarizes RMP to voltages above the threshold for activating subthreshold-persistent sodium channels (Na-p). Once Na-p channels are activated, the RMP becomes unstable, and spontaneous firing is triggered. Our results provide a biophysical mechanism for generating neural heterogeneity, which may play a role in the encoding of sensory information.

Disabling hearing loss prevalence in Juiz de Fora, Brazil

Data on the prevalence of disabling hearing loss (DHL) in Brazil is scarce, which impacts healthcare professionals' knowledge on the extent of the problem. Objectives: This study aimed at estimating DHL prevalence in the municipality of Juiz de Fora, Minas Gerais, to identify individual-related variables and find risk areas. Materials and Methods: This was a descriptive sectional population study held from January to October of 2009. We randomly selected 349 households with 1,050 individuals who with ages ranging between 4 days and 95 years. The data collection instruments were: WHO structured questionnaire, ENT examination and laboratory tests. Chi-square and Poisson regression models were used for analyses. Results: DHL prevalence was estimated at 5.2% (95% CI = 3.1 to 7.3) which was classified as moderate in 3.9% (95% CI = 0.001 to 0.134), severe in 0.9% (95% CI = 0.001 to 0.107) and profound in 0.4% (95% CI = 0.001 to 0.095). We found correlation between DHL and tinnitus; age over 60 years and low educational level. Conclusions: Our data obtained pointed to the need to create hearing health programs targeted to specific risk groups, promoting quality of life for hearing impaired patients.

Bioethics and medical/legal considerations on cochlear implants in children

Cochlear implants are the best treatment for congenital profound deafness. Pediatric candidates to implantation are seen as vulnerable citizens, and the decision of implanting cochlear devices is ultimately in the hands of their parents/guardians. The Brazilian Penal Code dictates that deaf people may enjoy diminished criminal capacity. Many are the bioethical controversies around cochlear implants, as representatives from the deaf community have seen in them a means of decimating their culture and intrinsic values. Objective: This paper aims to discuss, in bioethical terms, the validity of implanting cochlear hearing aids in children by analyzing their vulnerability and the social/cultural implications of the procedure itself, aside from looking into the medical/legal aspects connected to their criminal capacity. Materials and Methods: The topic was searched on databases Medline and Lilacs; ethical analysis was done based on principialist bioethics. Results: Cochlear implants are the best therapeutic option for people with profound deafness and are morally justified. The level of criminal capacity attributed to deaf people requires careful analysis of the subject's degree of understanding and determination when carrying out the acts for which he/she has been charged. Conclusion: Cochlear implants are morally valid. Implantations must be analyzed on an each case basis. ENT physicians bear the ethical responsibility for indicating cochlear implants and must properly inform the child's parents/guardians and get their written consent before performing the procedure.

Auditory brainstem implant outcomes and MAP parameters: Report of experiences in adults and children

The auditory brainstem implant (ABI) was first developed to help neurofibromatosis type 2 patients. Recently, its use has been recently extended to adults with non-tumor etiologies and children with profound hearing loss who were not candidates for a cochlear implant (Cl). Although the results has been extensively reported, the stimulation parameters involved behind the outcomes have received less attention. Objective: The aim of this study is to describe the audiologic outcomes and the MAP parameters in ABI adults and children at our center. Methods: Retrospective chart review. Five adults and four children were implanted with the ABI24M from September 2005 to June 2009. In the adult patients, four had Neurofibromatosis type 2, and one had postmeningitic deafness with complete ossification of both cochleae. Three of the children had cochlear malformation or dysplasia, and one had complete ossified cochlea due to meningitis. Map parameters as well as the intraoperative electrical auditory brainstem responses were collected. Evaluation was performed with at least six months of device use and included free-field hearing thresholds, speech perception tests in the adult patients and for the children, the Infant-Toddler Meaningful Auditory Integration Scale (IT-MAIS) and (ESP) were used to evaluate the development of auditory skills, besides the MUSS to evaluate. Results: The number of active electrodes that did not cause any non-auditory sensation varied from three to nineteen. All of them were programmed with SPEAK strategy, and the pulse widths varied from 100 to 300 mu s. Free-field thresholds with warble tones varied from very soft auditory sensation of 70 dBHL at 250 Hz to a pure tone average of 45 dBHL. Speech perception varied from none to 60% open-set recognition of sentences in silence in the adult population and from no auditory sensation at all to a slight improvement in the IT-MAIS/MAIS scores. Conclusion: We observed that ABI may be a good option for offering some hearing attention to both adults and children. In children, the results might not be enough to ensure oral language development. Programming the speech processor in children demands higher care to the audiologist. (C) 2011 Elsevier Ireland Ltd. All rights reserved.